Support explain options

Since rails 7.1, explain can take options. The issue is that both the name of options and the formatting is different between postgres and cockroach.

https://www.cockroachlabs.com/docs/stable/explain-analyze

As of now we do not support `explain analyze` either due to how the code was adjusted to fit PG behaviour in 7.1.

See tests:
- test_explain_options_with_eager_loading
- test_explain_with_options_as_symbols
- test_explain_with_options_as_strings